664632224216 has 8 divisors (see below), whose sum is σ = 1246185420420. Its totient is φ = 332316112104.

The previous prime is 664632224189. The next prime is 664632224251. The reversal of 664632224216 is 612422236466.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41539514006 + ... + 41539514021.

Almost surely, 2^664632224216 is an apocalyptic number.

It is an amenable number.

664632224216 is a deficient number, since it is larger than the sum of its proper divisors (581553196204).

664632224216 is a wasteful number, since it uses less digits than its factorization.

664632224216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83079028033 (or 83079028029 counting only the distinct ones).

The product of its digits is 995328, while the sum is 44.

The spelling of 664632224216 in words is "six hundred sixty-four billion, six hundred thirty-two million, two hundred twenty-four thousand, two hundred sixteen".